Coal mine separation layer grouting sinking reduction guide pipe
By designing a coal mine deseasoning and reducing sinking conduit, using the pressure of the grouting liquid to push the piston plate and closed plate for grouting, the problems of easy blockage of the grouting hole of the traditional conduit and easy interruption of the motor control signal are solved, and high efficiency is achieved. Low-cost grouting operation.
Patent Information
- Application Number
- CN202421497390.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-02-25
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The traditional grouting conduit is easily blocked when inserted into the ground, and opening and closing of the envelope through the motor control envelope requires increasing the cost of motors and other transmission equipment, and the wireless control signal is easily interrupted, resulting in failure of opening and closing.
A coal mine deseasoning and reducing sinking conduit was designed. The bottom of the conduit body was equipped with an elliptical tip seal, and an outer cylinder was fixed at the lower end. The outer cylinder was equipped with an annular recess and a step-shaped grouting hole, and the grouting hole was grouting hole. There are piston plates and closed plates at both ends respectively. The piston plates and closed plates are pushed open by the pressure of the grouting liquid for grouting, avoiding the use of motors and transmission equipment.
It effectively avoids clogging of grouting holes, reduces costs, and does not easily cause problems such as failure to open and close, and achieves efficient grouting operations.
Smart Images
Figure CN222526358U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a coal mine separation grouting and subsidence reduction conduit, belonging to the technical field of coal mine equipment. Background Art
[0002] With the development of society and the advancement of production technology, people's demand for energy is increasing. Coal, as the main energy source, is being mined from underground in large quantities. After coal is mined from underground, the overlying rock layer loses its support, and the original stress balance state inside the rock body is destroyed, causing the redistribution of stress in the rock body, causing the rock mass around the goaf to displace, deform, and even be destroyed. At present, grouting is often used to control subsidence in the overburden layer. The overburden layer grouting settlement reduction technology can artificially form a filling and compaction bearing body, change the activity state of the overburden, and greatly control the surface settlement. Compared with mining without grouting, the surface settlement reduction rate is significantly improved, and the filling effect is good.
[0003] However, the traditional grouting catheter cannot seal the grouting hole, which causes the grouting hole to be easily blocked when the grouting catheter is inserted into the ground. Now there are also some grouting catheters with a seal controlled by a motor on the inside of the grouting hole, and the seal is moved by the motor to open and close the grouting hole. However, this requires the addition of transmission equipment such as motors, which increases the cost. In addition, the grouting catheter works deep underground and is started by wirelessly controlling the motor. The signal is easily interrupted, resulting in failure to open and close. Utility Model Content
[0004] The utility model provides a coal mine delamination grouting and sinking reduction conduit, which solves the problem that the grouting hole is currently opened and closed by moving a sleeve driven by a motor, and transmission equipment such as a motor needs to be added, which increases the cost. In addition, the grouting conduit works deep underground, and the motor is started by wireless control, and the signal is easily interrupted, resulting in failure of opening and closing.
[0005] The utility model relates to a coal mine delamination grouting and sinking reduction conduit, comprising a conduit body, an elliptical tip end cap is arranged at the bottom of the conduit body, an outer cylinder is fixed at the lower end of the conduit body, the bottom of the outer cylinder is conical, an annular concave platform is arranged on the upper outer wall of the outer cylinder, a plurality of stepped grouting holes are arranged on the annular concave platform, the inner ends of the grouting holes extend to the inner wall of the conduit body, a piston disc 1 and a closing disc are arranged at both ends of the grouting holes, a guide rod is fixedly connected between the piston disc 1 and the closing disc, a plurality of guide fan-shaped blocks matched with the middle hole wall of the grouting hole are fixed in a circular array outside the guide rod, a spring 1 is sleeved on the guide rod inside the guide fan-shaped block, the inner end of the spring 1 is fixed to the inner end step platform of the grouting hole, and the other end of the spring 1 is fixed to the guide fan-shaped block.
[0006] As a preferred embodiment, a plurality of circular arrays of grouting holes are arranged on the annular concave platform, and the grouting holes are inclined holes. The grouting liquid sprayed out of the grouting holes can be sprayed out at an angle, so that the external grouting liquid can flow better.
[0007] As a preferred embodiment, a plurality of stepped limiting holes are provided in a circular array on the side wall of the outer cylinder below the annular recess, the inner ends of the limiting holes extend to the inner walls of the catheter body, a piston disc 2 is provided at the inner end of the limiting hole, a limiting rod is fixed at the outer end of the piston disc 2, a spring 2 is sleeved on the limiting rod, a supporting ring is fixed at the outer end of the spring 2, the inner end of the spring 2 is fixed to the inner end step of the limiting hole, and during grouting, the pressure of the grouting liquid can be used to push the piston disc 2 to move outward, so that the limiting rod is inserted into the inner wall of the grouting eye, thereby better preventing the catheter body from being pulled out of the grouting eye.
[0008] As a preferred embodiment, the outer end of the limiting rod is provided with a fixed tip to facilitate the insertion of the limiting rod.
[0009] As a preference, the outer side wall of the closing disk is arc-shaped and flush with the side wall of the annular recess.
[0010] The utility model has the following beneficial effects:
[0011] The grouting hole is arranged on the annular concave platform to avoid direct contact with the grouting eye wall and better avoid blockage of the grouting hole. A piston disk 1 and a closing disk are arranged in the grouting hole to avoid blockage of the grouting hole when the conduit body is lowered. During grouting, the piston disk 1 and the closing disk are pushed open by the pressure of the grouting liquid for grouting. There is no need to add transmission equipment such as motors, which reduces costs and is not prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model;
[0013] Figure 2 for Figure 1 Schematic diagram of some structures;
[0014] Figure 3 It is a schematic diagram of the top cross-sectional structure at the grouting hole;
[0015] Figure 4 A schematic diagram of the side structure of the guide sector block;
[0016] In the figure: 1. catheter body, 2. piston disk 1, 3. closing disk, 4. guide rod, 5. limit rod, 6. outer cylinder, 7. piston disk 2, 8. spring 2, 9. support ring, 10. spring 1, 11. guide sector block, 12. tip end cap, 13. annular concave platform, 14. grouting hole, 15. limit hole. DETAILED DESCRIPTION
[0017] The utility model is further described below in conjunction with embodiments.
[0018] Embodiment 1, as Figures 1 to 4As shown, the utility model is a coal mine delamination grouting and subsidence reduction conduit, comprising a conduit body 1, an elliptical tip end cap 12 is provided at the bottom of the conduit body 1, an outer cylinder 6 is fixed at the lower end of the conduit body 1, the bottom of the outer cylinder 6 is conical, an annular recess 13 is provided on the upper outer wall of the outer cylinder 6, a plurality of stepped grouting holes 14 are provided on the annular recess 13, the inner end of the grouting hole 14 extends to the inner wall of the conduit body 1, a piston disc 2 and a closing disc 3 are provided at both ends of the grouting hole 14, a guide rod 4 is fixedly connected between the piston disc 2 and the closing disc 3, a plurality of guide sector blocks 11 matched with the middle hole wall of the grouting hole 14 are fixed in a circular array outside the guide rod 4, a spring 10 is sleeved on the guide rod 4 inside the guide sector block 11, the inner end of the spring 10 is fixed to the inner end step of the grouting hole 14, and the other end of the spring 10 is fixed to the guide sector block 11.
[0019] When in use, the catheter body 1 is lowered into the grouting hole. During this process, the closing disk 3 is pulled by the spring 10 and sticks to the step outside the grouting hole 14 to prevent the grouting hole 14 from being blocked when the pipe is lowered. When grouting, high-pressure slurry enters the catheter body 1. At this time, the slurry presses the piston disk 2 to overcome the pulling force of the spring 10, pushes the piston disk 2 outward from the inner end of the grouting hole 14, and pushes the closing disk 3 out of the grouting hole, and the slurry is discharged from the grouting hole 14 to carry out grouting.
[0020] Embodiment 2, based on embodiment 1, a plurality of grouting holes 14 are arranged in a circular array on the annular recess 13, and the grouting holes 14 are inclined holes.
[0021] There are multiple stepped limiting holes 15 in a circular array on the side wall of the outer cylinder 6 below the annular concave platform 13. The inner end of the limiting hole 15 extends to the inner wall of the catheter body 1. The inner end of the limiting hole 15 is provided with a piston plate 27. The outer end of the piston plate 27 is fixed with a limiting plug rod 5. The limiting plug rod 5 is sleeved with a spring 28. The outer end of the spring 28 is fixed with a support ring 9. The inner end of the spring 28 is fixed to the inner end step of the limiting hole 15. During grouting, the high-pressure slurry will press the piston plate 27 to overcome the pulling force of the spring 28 and move outward, so that the limiting plug rod 5 is inserted into the inner wall of the grouting hole for limiting fixation.
[0022] The outer end of the limiting plug rod 5 is provided with a fixed tip.
[0023] The outer side wall of the closing disk 3 is arc-shaped and flush with the side wall of the annular recess 13 .
[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
[0025] In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.
Claims
1. A coal mine delamination grouting and subsidence reduction conduit, comprising a conduit body (1), the bottom of the conduit body (1) is provided with an elliptical tip end cap (12), the lower end of the conduit body (1) is fixed with an outer cylinder (6), the bottom of the outer cylinder (6) is conical, and is characterized in that: An annular concave platform (13) is provided on the upper outer wall of the outer cylinder (6), and a plurality of stepped grouting holes (14) are provided on the annular concave platform (13). The inner ends of the grouting holes (14) extend to the inner wall of the catheter body (1). A piston disk (2) and a closing disk (3) are provided at both ends of the grouting hole (14), respectively. A guide rod (4) is fixedly connected between the piston disk (2) and the closing disk (3). A plurality of guide sector blocks (11) that cooperate with the middle hole wall of the grouting hole (14) are fixed in a circular array outside the guide rod (4). A spring (10) is sleeved on the guide rod (4) inside the guide sector block (11), and the inner end of the spring (10) is fixed to the inner end step of the grouting hole (14), and the other end of the spring (10) is fixed to the guide sector block (11).
2. A coal mine separation grouting and subsidence reduction conduit according to claim 1, characterized in that: A plurality of grouting holes (14) are arranged in a circular array on the annular concave platform (13), and the grouting holes (14) are inclined holes.
3. A coal mine separation grouting and subsidence reduction conduit according to claim 1, characterized in that: A plurality of stepped limiting holes (15) are arranged in a circular array on the side wall of the outer cylinder (6) below the annular concave platform (13). The inner ends of the limiting holes (15) extend to the inner wall of the catheter body (1). A piston disc 2 (7) is arranged at the inner end of the limiting hole (15). A limiting insert rod (5) is fixed to the outer end of the piston disc 2 (7). A spring 2 (8) is sleeved on the limiting insert rod (5). A support ring (9) is fixed to the outer end of the spring 2 (8). The inner end of the spring 2 (8) is fixed to the inner end stepped platform of the limiting hole (15).
4. A coal mine separation grouting and subsidence reduction conduit according to claim 3, characterized in that: The outer end of the limiting plug rod (5) is provided with a fixed tip.
5. The coal mine separation grouting and subsidence reduction conduit according to claim 1, characterized in that: The outer side wall of the closing disk (3) is arc-shaped and is flush with the side wall of the annular recess (13).